Panic Nfs_boot Mountd Root Error=72
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machines, we also hope to make upgrades easier, to allow easy retrogression, and to allow easy substitution of one piece of hardware for another. Our motivation has nothing to do with saving the cost of a boot vfs: cannot open root device "nfs" or unknown-block(2,0): error -6 disk, and we are not using the clients as xterms. This is not installing
Vfs Unable To Mount Root Fs Via Nfs Trying Floppy
from the net. Not that there is anything wrong with that, but we have a different purpose. Our systems are not really diskless please append a correct root= boot option - but they boot from a centralized and shared network resource and provide remote compute, storage and network services. We have experience with PXE booting FreeBSD 5.4, 6.0, 6.2, 7.0, 7.2, 8.0, 8.1 and 9.0beta3 using the please append a correct root boot option here are the available partitions exact methods documented here. All bootp and all earlier versions of FreeBSD have quite different requirements for diskless booting which are covered in many other tutorials on the web and in /etc/share/examples/diskless to this day. These instructions will be quite misleading when applied to any recent release. If you see instructions greatly different from those here, they are likely for FreeBSD 4. or prior. The only other sources of information I am aware of for
Kernel Panic - Not Syncing: Vfs: Unable To Mount Root Fs On Unknown-block(2,0)
5.4+ is the recently published 2nd edition of the book "Absolute FreeBSD" by Michael Lucas, and a postings by Eric Norgaard , Andy Thomas and Warren Block. The FreeBSD handbook has recently been revised, but it still does not have enough information to actually complete the task. Overview The client PXE boot code in ROM directs the client as it obtains from the dhcp server the IP address of the tftp server (called "next-server" by dhcpd) obtains the boot loader (called "pxeboot" by FreeBSD), and the name of the NFS server exporting the root directory. The boot loader arranges to NFS mount the root directory read only. Once root is mounted, the script /etc/rc.initdiskless runs on the client to create and populate /etc and /var, and otherwise readies the machine for login. This happens for each boot. While /usr, /bin and /sbin can be shared across multiple systems without change, /var and /etc contain many per-client files, and many writable files, which require special treatment. During the diskless boot, /etc/rc.initdiskless creates and populates in memory versions of /var and /etc according to the contents of the /pxeroot/conf directory. While that directory is read-only, the in memory copies on the client can be written, although the contents are lost on reboot. Unfortunately many applications like to write outside the user home directory, and
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have been following Adrian Chadd's instructions. But havesome problems with http://freebsd-mips.freebsd.narkive.com/2jE0jT5a/freebsd-on-routerstation-pro the filesystem mounting.I tried to tftpboot the kernel + filesystem over NFSI have cross compiled from FreeBSD 9 snaphost 201010 with the following script:setenv SRCROOT /usr/srcsetenv TARGET mipssetenv KERNCONF AR71XXsetenv MAKEOBJDIRPREFIX /mynfs/usr/obj/mipsset NFSROOT=/mynfs/usr/srcset TFTPBOOT=/mynfs/tftpbootset MAKEFLAGS=(-DWITHOUT_CDDL \-DWITHOUT_GAMES \-DWITHOUT_DOCS \-DWITHOUT_KERBEROS \-DWITHOUT_ACPI \-DWITHOUT_KERBEROS \-DWITHOUT_RESCUE \-DWITHOUT_MAN \-DWITHOUT_PROFILE unable to \-DWITHOUT_BSNMP \-DWITHOUT_NIS \-DWITHOUT_IPX \-DWITHOUT_ATM)cd ${SRCROOT}make ${MAKEFLAGS} kernel-toolchainmake ${MAKEFLAGS} buildkernelmake ${MAKEFLAGS} DESTDIR=${TFTPBOOT} installkernelmake ${MAKEFLAGS} buildworldmake DESTDIR=${NFSROOT} ${MAKEFLAGS} installworldmake DESTDIR=${NFSROOT} ${MAKEFLAGS} distributionI only changed the ipaddress for the nfs boot in the/usr/src/sys/mips/conf/AR71XX configuration file:options ROOTDEVNAME=\nfs:192.168.1.100:/mnt/bsd\"I think I have setup the DHCP server correct:option root-path "192.168.1.100:/mnt/bsd";subnet unable to mount 192.168.1.0 netmask 255.255.255.0 {range 192.168.1.100 192.168.1.200;option domain-name-servers 208.67.220.220, 208.67.220.222;option routers 192.168.1.1;option broadcast-address 192.168.1.255;default-lease-time 600;max-lease-time 7200;}host client1 {hardware ethernet XX:XX:XX:XX:XX:XX; #mac address of the RSPRO boardfixed-address 192.168.1.20;}I also exported the filsystem:/mnt/bsd192.168.1.20(rw,no_subtree_check,async,insecure,no_root_squash)The kernel boots from TFTP correct but panics when trying to mountfilesystem [?]:Received DHCP Offer packet on arge0 from 192.168.1.100 (accepted) (no root path)Received DHCP Offer packet on arge0 from 192.168.1.100 (ignored) (no root path)Received DHCP Offer packet on arge0 from 192.168.1.100 (ignored) (no root path)Sending DHCP Request packet from interface arge0 (XX:XX:XX:XX:XX:XX)Received DHCP Ack packet on arge0 from 192.168.1.100 (accepted) (got root path)arge0 at 192.168.1.20 server 192.168.1.100subnet mask 255.255.255.0 router 192.168.1.1 rootfs 192.168.1.100:/Adjusted interface arge0panic: nfs_boot: mountd root, error=72KDB: enter: panic[ thread pid 0 tid 100000 ]Stopped at kdb_enter+0x50: lui at,0x804adb>when I check syslog:Oct 26 17:14:03 hamren mountd[3298]: